Pump valve



' Nov. 2o, 192s.. 1,692,795

, L. B. CLIFFORD Puur vALvE Filed Jan. '7, 1927 \C&

- INVENTOR 12.15. czzfwrd,

BY Mr@- ATTORNEYS Patented Nov. 20, 1928.

UNITED STATES PATENT OFFICE.

LESLIE B. CLIFFORD, or TEXARKANA, annuels PUMP VALVE.

Application med January 7, 1927. semi no. 159,650.

This invention relates' to valves and valve seats for pumps, and has for its object the provision ofa valve having a guide upon its opposite faces for maintaining the valve properly centered during operation so that said valve will be seated with the valve seat sheared off at an acute angle in order to prevent foreign matter collecting on the same.

A further object of the invention is the pro- 'vision of a valve so constructed as to reduce the friction and side Wear on the valve stem with' a rubber composition valve secured on the stem against leakage with the valve stemv having an upward hollow guide provided with passages for permitting the flow of Y liquid into and out of the hollow guide.

This invention will be best understood from a consideration ofthe following detailed description, in view of the accompanying drawings forming a part of the-specification; nevertheless it 1s to be. understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications which shall define no material departure yfrom the salient features of the invention as 'the line 3-3 of Figure 2.

Referrino' more particularly to the drawings 10 deslgnates a valve stem movable in a` bushing 11 carried by a hollow guide 12. The guide 12 has a pair of diametrically disposed passages 13 adapted to align with passages 1li-in the bushing 11 in order to permit the passage of fluid through the hollow bushing 11 which is held in place by a set screw 11a carried by the guide 12. y

The upper end of the stem 10 is adapted to abut a composition disc -16 which prevent-s shocks to the stem; The guide 12 is cylindrical in shape and depends from a pump pot cover 17 resting on a {iange 15 at the top of the water chamber 15 of the pump.

A portion of the stem 10 is conically shaped, as shown' at 18. A disc or cover 19 has a central perforation which is tapered to receive thetapered or conically shaped portion'18 of the stem and abuts a shoulder 18al on said stem. A composition or rubber valve 20 is carried on the portion 18 of the stem and has its upper end received by the annular depending flange 21 of the cover 19.`- The side wall il 22 of the valve 20 is cut at anangle about 25. A washer 23 seated on thelower end of the valvev 20 is secured in place by means of a lock nut 24 threaded on to the portion 24sL of the stem.

, A cup-shaped member 26 seated in the beveled ring 26a embraces the lower reduced end 27 of the stem and has a passage 28 in which is mounted a sleeve 29, the upper end of which is flanged, as shown at 30, while the lower end is swaged, as shown at-31,1so that the sleeve will be prevent-ed from loss from the passage 28 in the cup-shaped member 26. A bearing 31 which is carried by the arms l32 formed integrally with the cupshaped memsleeve 29. The construction of the lcupshapedmember through the arms 32 permits -the free passage of liquid past the upper end .ber 26 is adapted to Support the bushing or of the cup-shaped member when the valve 20 is elevated therefrom.

The upper end of the cup-shaped member is sheared of to provide a ,valve seat 33 which is inclined at an angle which conforms to the inclination, of the valve 2@ so that the valve will be properly seated thereon. It will-be noted that the bevelliine; of the valve seat 33 issuch that foreign matter will not be able to collect thereon so that it will readily fall by gravity below thevalve seat.

A -spring 434 has its upper end in engagement with the lower end of the bushing or sleeve 11 while its lower end rests upon the cover 19. This valveis particularly useful for employment in slush pumps for drilling deep wells. T-he fact that the angle of inclination of the seat 33 is such that detritus will be readily dislodged therefrom rovides for a rapid and tight fitting valve.` urthermore, the double guide means at opposite sides of the valve 20 also provides fora proper seating of the valve sothat no leakage will occur.

The upper end of the. stem 10 is provided with longitudinal grooves 25'to permit passage of fluid between the lchamber 15 and a chamber 16 in the bushing 11 above the stem 10.

I claim A valve havin a body construction comprising a valve ormed of composition material, a metal ,cover in contact with the valve,

astem having a threaded portion for engagement with the valve body, the stem pro- ]ecting upon opposite'sides. ofthe valve, a

tubular guide at one side ofthe valve, a bushing received b v the guide, said bushing and guide having aligned passages, one end of the stem being slidably mounted in said bushing, a cup-shapedv member at the opposite side of the valve and provided with a valve seat, a guide carried bythe cup-shaped member for the other end of the stern, seidl cupshaped member being provided With open- 4 ings for permitting the free passage, of the Water, the seat and valve being sheared off atan angle of 25 so that foreign matter will be prevented from collecting on the valve seat.

LESLIE B. CLIFFORD'. 4 

